Process for imparting luster to yarns, fabric, and the like.



least-so high that the we UNIT D STATES PATENT OFFICE.

LUDWIG SGHREINEB, OF OEHDE, NEAR BARMEN, GERMANY, ASSIGNOR TO THE FIRM OF J. I. IBEMBERG, AKTIENGESELLSCHAFT, OF BARMEN-RITTERSHAUSEN, GER- MANY.

rnocriss non. imrenrmo LUSTER TO YARNS, FABRIC, AND THE LIKE.

No Drawing.

Specification of Letters Patent.

v Application filed December 21, 1909. Serial No. 534,353.

Patented Mar. 12, 1912.

rics and the like.

The invention consists in making the goods quite wet and then calendering them under high pressure, at a high temperature, and with such a high speed that the goods are still wet after the calendering.

It is known to produce a brilliant and fairly lasting luster by moistening and calendering goods under high pressure, at a high temperature so that the, goods are dried by the calendering process. The present invention differs from suchknown rocess by making the goods not only moist but quite wet and by accelerating the calendering process so that the goods are not dried, but are still moist or wet after being calendered. It is furthermore known to ass wet goods around a steam-heated cylin er; but, hereby, a lasting or permanent luster cannot be obtained. The present invention differs from this by the fact that the temperature used in calendering the oods, 'must be at 1 known Leydenfrosts phenomenon takes place, z'. e., that the water, in contact with the heated surface of the rollers used for calendering the goods, does not evaporate at once, but forms spheres separated from the heated surface of said roller by a thin la or or coat of steam which retards the fort er evaporation of the water.

By the present invent-ion, the following advantages are obtained: a higher and more permanent luster and a peculiar silver-like glittering character of such luster. Furthermore, the goods are better protected against the burnin effect of the heated roller used for calendering them, and against the oxidizing effect of the air on the hot goods, sothat much higher temperature can be used in calendering the goods than heretofore. The base and impermanent parts of the luster are removed in one operation with- .lust'er to table fibers, consisting in making the goods out any special subsequent damping being 65 required. The goods treated according to the present in rcntion can be dyed after calendaring them, and hereby obtain a much more uniform color than with the known processes for producing high luster on goods by calendering them.

In order to provide the yarns and the like with permanent luster on both sides, they are passed through two calendering machines in series one after the other; the steel roller of one calender lies beneath and that of the other on top. In order to raise the flattened shape the yarns can, if desired, be subsequently soaked in hot water.

Instead of employing simple pressure, the latter may be combined with friction, e. g. by different speeds of the two rollers, placing them obliquely and so on. In a similar way to yarns, other products consisting of vegetable threads can also be treated, such as woven goods, fabrics, etc., for which as a rule treatment on one side is sutlicient. Any kind of roller e. g. polished, engraved, and so on, may be employed as the pressure roller.

The above process can be employed upon both mercerized and non-merccrized fabrics.

at I claim as my invention and desire to secure by Letters Patent is:

1. A process for impartiu permanent luster to fabrics or the like ma e from vegetable fibers, consisting inmaking the goods quite wet, and then calendering them under high pressure, at so high a temperature as to produce Leydenfrosts phenomenon between the surfaces of the calendering a ent and the moist goods, and with so big a .speed that the goods are still moist after calendering them.

2. A process for im arting ermanent luster to fabrics or the li e made rom vegetable fibers, consisting in making the goods quite wet, and then calendering them with friction under high pressure, at'so high a temperature as to produce Leydenfrosts phenomenon between the surfaces of the calendering agent and the moist oods, and with so high a speed that the goo s are still moist after calendering them. i

3. A process 'for' imparting permanent fabrics or the like made from vegequite wet, and then calendering and embossing them uncler high pressure, at so high denfrosts phenomenon betweenthe surfaces a temperature as to produce Leydenfrosts of the calendering agentand the moist phenomenon between the surfaces of the calgoods, and, With so high a speed. that the endering agent and the moist goods, and goods are still moist after calendering and with so high a speed that the goods are still embossing them.

moist after calendering and embossing them. In testimony whereof, I have signed my 4. A process, for imparting permanent name to this specification in the presence luster to fabrics or the like made from Vegeof twosubscribing witnesses.

table fibers, consisting inmaking the goods vLUDNIGr SCI-IREINER. [L. 's.] quite wet, and then calendering and embos- WVitnesses: I sing them with friction under high pressure, OTTO Kt'm IG,

- at so high a temperature as to produceLey- -VVILLY KLEIN. 

